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livetrax/libs/pbd/controllable.cc

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/*
Copyright (C) 2000-2007 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "pbd/controllable.h"
#include "pbd/xml++.h"
#include "pbd/error.h"
#include "i18n.h"
using namespace PBD;
using namespace std;
PBD::Signal1<void,Controllable*> Controllable::Destroyed;
PBD::Signal1<bool,Controllable*> Controllable::StartLearning;
PBD::Signal1<void,Controllable*> Controllable::StopLearning;
PBD::Signal3<void,Controllable*,int,int> Controllable::CreateBinding;
PBD::Signal1<void,Controllable*> Controllable::DeleteBinding;
Glib::StaticRWLock Controllable::registry_lock = GLIBMM_STATIC_RW_LOCK_INIT;
Controllable::Controllables Controllable::registry;
Controllable::ControllablesByURI Controllable::registry_by_uri;
PBD::ScopedConnectionList registry_connections;
Controllable::Controllable (const string& name, const string& uri)
: _name (name)
, _uri (uri)
, _touching (false)
{
add (*this);
}
void
Controllable::add (Controllable& ctl)
{
using namespace boost;
Glib::RWLock::WriterLock lm (registry_lock);
registry.insert (&ctl);
if (!ctl.uri().empty()) {
pair<string,Controllable*> newpair;
newpair.first = ctl.uri();
newpair.second = &ctl;
registry_by_uri.insert (newpair);
}
/* Controllable::remove() is static - no need to manage this connection */
ctl.DropReferences.connect_same_thread (registry_connections, boost::bind (&Controllable::remove, &ctl));
}
void
Controllable::remove (Controllable* ctl)
{
Glib::RWLock::WriterLock lm (registry_lock);
for (Controllables::iterator i = registry.begin(); i != registry.end(); ++i) {
if ((*i) == ctl) {
registry.erase (i);
break;
}
}
if (!ctl->uri().empty()) {
ControllablesByURI::iterator i = registry_by_uri.find (ctl->uri());
if (i != registry_by_uri.end()) {
registry_by_uri.erase (i);
}
}
}
void
Controllable::set_uri (const string& new_uri)
{
Glib::RWLock::WriterLock lm (registry_lock);
if (!_uri.empty()) {
ControllablesByURI::iterator i = registry_by_uri.find (_uri);
if (i != registry_by_uri.end()) {
registry_by_uri.erase (i);
}
}
_uri = new_uri;
if (!_uri.empty()) {
pair<string,Controllable*> newpair;
newpair.first = _uri;
newpair.second = this;
registry_by_uri.insert (newpair);
}
}
Controllable*
Controllable::by_id (const ID& id)
{
Glib::RWLock::ReaderLock lm (registry_lock);
for (Controllables::iterator i = registry.begin(); i != registry.end(); ++i) {
if ((*i)->id() == id) {
return (*i);
}
}
return 0;
}
Controllable*
Controllable::by_uri (const string& uri)
{
Glib::RWLock::ReaderLock lm (registry_lock);
ControllablesByURI::iterator i;
if ((i = registry_by_uri.find (uri)) != registry_by_uri.end()) {
return i->second;
}
return 0;
}
Controllable*
Controllable::by_name (const string& str)
{
Glib::RWLock::ReaderLock lm (registry_lock);
for (Controllables::iterator i = registry.begin(); i != registry.end(); ++i) {
if ((*i)->_name == str) {
return (*i);
}
}
return 0;
}
XMLNode&
Controllable::get_state ()
{
XMLNode* node = new XMLNode (X_("Controllable"));
char buf[64];
node->add_property (X_("name"), _name); // not reloaded from XML state, just there to look at
_id.print (buf, sizeof (buf));
node->add_property (X_("id"), buf);
if (!_uri.empty()) {
node->add_property (X_("uri"), _uri);
}
return *node;
}
int
Controllable::set_state (const XMLNode& node, int /*version*/)
{
const XMLProperty* prop;
if ((prop = node.property (X_("id"))) != 0) {
_id = prop->value();
return 0;
} else {
error << _("Controllable state node has no ID property") << endmsg;
return -1;
}
if ((prop = node.property (X_("uri"))) != 0) {
set_uri (prop->value());
}
}